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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef V4L2_CAMERA_HAL_METADATA_STATE_H_
#define V4L2_CAMERA_HAL_METADATA_STATE_H_
#include "../common.h"
#include "metadata_common.h"
#include "partial_metadata_interface.h"
#include "state_delegate_interface.h"
namespace v4l2_camera_hal {
// A State is a PartialMetadata that only has a single dynamic value.
template <typename T>
class State : public PartialMetadataInterface {
public:
State(int32_t tag, std::unique_ptr<StateDelegateInterface<T>> delegate)
: tag_(tag), delegate_(std::move(delegate)){};
virtual std::vector<int32_t> StaticTags() const override { return {}; };
virtual std::vector<int32_t> ControlTags() const override { return {}; };
virtual std::vector<int32_t> DynamicTags() const override { return {tag_}; };
virtual int PopulateStaticFields(
android::CameraMetadata* metadata) const override;
virtual int PopulateDynamicFields(
android::CameraMetadata* metadata) const override;
virtual int PopulateTemplateRequest(
int template_type, android::CameraMetadata* metadata) const override;
virtual bool SupportsRequestValues(
const android::CameraMetadata& metadata) const override;
virtual int SetRequestValues(
const android::CameraMetadata& metadata) override;
private:
int32_t tag_;
std::unique_ptr<StateDelegateInterface<T>> delegate_;
};
// -----------------------------------------------------------------------------
template <typename T>
int State<T>::PopulateStaticFields(android::CameraMetadata* metadata) const {
HAL_LOG_ENTER();
return 0;
}
template <typename T>
int State<T>::PopulateDynamicFields(android::CameraMetadata* metadata) const {
HAL_LOG_ENTER();
T value;
int res = delegate_->GetValue(&value);
if (res) {
return res;
}
return UpdateMetadata(metadata, tag_, value);
};
template <typename T>
int State<T>::PopulateTemplateRequest(int template_type,
android::CameraMetadata* metadata) const {
HAL_LOG_ENTER();
return 0;
};
template <typename T>
bool State<T>::SupportsRequestValues(
const android::CameraMetadata& metadata) const {
HAL_LOG_ENTER();
return true;
};
template <typename T>
int State<T>::SetRequestValues(const android::CameraMetadata& metadata) {
HAL_LOG_ENTER();
return 0;
};
} // namespace v4l2_camera_hal
#endif // V4L2_CAMERA_HAL_METADATA_STATE_H_
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